Abstract:In response to the landing problem of unpowered probes in weak gravity binary asteroid systems, a robust release strategy design method for unpowered probes is proposed based on the dynamics model of the vicinity of the surface in contact with the bouncing contact between the probes and the body, considering the inevitable deviation of the navigation and control systems in engineering. Use Monte Carlo simulation to analyze the uncertainty of landing trajectory end state errors caused by navigation and control errors. By conducting a comprehensive analysis of three different initial trajectories: release from periodic orbits, release from Lagrange points, and release from external hovering points, the robustness and safety of the release of the unpowered probes are summarized, and the optimal robust release strategy is obtained.